.payment-page {
	--pay-ink: #182131;
	--pay-blue: #2456a6;
	--pay-cyan: #0f8a9d;
	--pay-lime: #7d9a28;
	--pay-warn: #b65f22;
}

.payment-hero {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 310px;
	gap: 22px;
	align-items: stretch;
	margin-bottom: 22px;
	padding: 30px;
	background:
		linear-gradient(135deg, #ffffff 0%, #edf7fb 45%, #f7f5ea 100%);
	border: 1px solid #cadce8;
	border-radius: 8px;
	box-shadow: var(--shadow);
}

.payment-hero h1 {
	color: var(--pay-ink);
}

.payment-hero p {
	color: #435166;
}

.payment-ticket {
	display: grid;
	align-content: center;
	gap: 8px;
	padding: 18px;
	color: #ffffff;
	background: var(--pay-ink);
	border-radius: 8px;
}

.payment-ticket span,
.solver-tabs span,
.answer-main span,
.answer-grid span,
.formula-box span,
.mini-legend span {
	font-size: 12px;
	font-weight: 800;
	text-transform: uppercase;
}

.payment-ticket span {
	color: #9bd7e3;
}

.payment-ticket strong {
	font-size: 27px;
	line-height: 1.1;
}

.payment-ticket p {
	margin: 0;
	color: #d7e1ec;
	font-size: 14px;
}

.payment-workbench {
	display: grid;
	grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
	gap: 20px;
	align-items: start;
}

.solver-panel,
.answer-panel,
.content-section,
.disclaimer {
	background: #ffffff;
	border: 1px solid var(--line);
	border-radius: 8px;
	box-shadow: var(--shadow-soft);
}

.solver-panel,
.answer-panel {
	padding: 22px;
}

.solver-tabs {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 10px;
	margin-bottom: 18px;
}

.solver-tabs label {
	cursor: pointer;
}

.solver-tabs input {
	position: absolute;
	opacity: 0;
}

.solver-tabs span {
	display: flex;
	min-height: 48px;
	align-items: center;
	justify-content: center;
	padding: 10px;
	color: #4b5b70;
	background: #f7f9fc;
	border: 1px solid #d4e0eb;
	border-radius: 8px;
	text-align: center;
}

.solver-tabs input:checked + span {
	color: #ffffff;
	background: var(--pay-blue);
	border-color: var(--pay-blue);
}

.input-strip {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 12px;
}

.field {
	display: grid;
	gap: 7px;
	color: #344052;
	font-size: 14px;
	font-weight: 800;
}

.field input {
	width: 100%;
	min-height: 46px;
	padding: 10px 12px;
	color: var(--text);
	background: #ffffff;
	border: 1px solid #c5d1e1;
	border-radius: 7px;
	font: inherit;
}

.field input:focus {
	border-color: var(--pay-blue);
	outline: none;
	box-shadow: 0 0 0 3px rgba(36, 86, 166, 0.16);
}

.field.is-muted {
	opacity: 0.55;
}

.field.is-muted input {
	background: #f3f6fa;
}

.scenario-row {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-top: 16px;
}

.scenario-row button,
.copy-button {
	min-height: 42px;
	padding: 10px 14px;
	cursor: pointer;
	border-radius: 7px;
	font: inherit;
	font-weight: 800;
	transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.scenario-row button {
	color: var(--pay-blue);
	background: #edf4ff;
	border: 1px solid #c7d9f2;
}

.scenario-row button:hover,
.copy-button:hover {
	transform: translateY(-1px);
	box-shadow: var(--shadow-soft);
}

.answer-panel {
	position: sticky;
	top: 86px;
	display: grid;
	gap: 14px;
	background:
		linear-gradient(180deg, #ffffff 0%, #f6fbfd 100%);
}

.answer-main {
	padding: 18px;
	color: #ffffff;
	background: var(--pay-blue);
	border-radius: 8px;
}

.answer-main span {
	color: #d8ebff;
}

.answer-main strong {
	display: block;
	margin-top: 8px;
	font-size: 40px;
	line-height: 1.1;
	overflow-wrap: anywhere;
}

.answer-main p {
	margin: 10px 0 0;
	color: #e6f0ff;
}

.answer-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 10px;
}

.answer-grid div,
.formula-box,
.warning-box {
	padding: 13px;
	background: #ffffff;
	border: 1px solid #dce7ef;
	border-radius: 8px;
}

.answer-grid span,
.formula-box span {
	color: var(--muted);
}

.answer-grid strong {
	display: block;
	margin-top: 4px;
	color: var(--pay-ink);
	font-size: 18px;
}

.formula-box p,
.warning-box {
	margin: 0;
	color: #435166;
}

.warning-box {
	color: #6f3a10;
	background: #fff7ed;
	border-color: #f3cfaa;
	font-weight: 700;
}

.copy-button {
	color: #ffffff;
	background: var(--pay-cyan);
	border: 1px solid var(--pay-cyan);
}

.content-section {
	margin-top: 18px;
	padding: 24px;
}

.content-section p,
.content-section li {
	color: #435166;
}

.content-section p {
	margin: 0;
}

.content-section p + p {
	margin-top: 12px;
}

.content-section ul {
	margin: 0;
	padding-left: 22px;
}

.content-section li + li {
	margin-top: 8px;
}

.content-section a {
	color: var(--pay-blue);
	font-weight: 800;
	text-decoration: underline;
	text-underline-offset: 3px;
}

.schedule-heading {
	display: flex;
	justify-content: space-between;
	gap: 18px;
	align-items: start;
	margin-bottom: 14px;
}

.schedule-heading p {
	margin-top: 8px;
}

.mini-legend {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.mini-legend span {
	display: inline-flex;
	gap: 6px;
	align-items: center;
	color: var(--muted);
}

.mini-legend i {
	display: inline-block;
	width: 14px;
	height: 8px;
	background: var(--pay-cyan);
	border-radius: 999px;
}

.mini-legend span:nth-child(2) i {
	background: var(--pay-warn);
}

.balance-chart {
	display: grid;
	grid-auto-flow: column;
	grid-auto-columns: minmax(36px, 1fr);
	gap: 8px;
	align-items: end;
	min-height: 180px;
	padding: 14px;
	background: #f7f9fc;
	border: 1px solid var(--line);
	border-radius: 8px;
	overflow-x: auto;
}

.balance-chart div {
	display: grid;
	min-width: 36px;
	height: 140px;
	align-items: end;
	text-align: center;
}

.balance-chart span,
.balance-chart em {
	display: block;
	width: 100%;
}

.balance-chart span {
	background: var(--pay-cyan);
}

.balance-chart em {
	background: var(--pay-warn);
	border-radius: 5px 5px 0 0;
}

.balance-chart strong {
	margin-top: 6px;
	color: var(--muted);
	font-size: 12px;
}

.chart-empty {
	grid-column: 1 / -1;
	align-self: center;
	justify-self: center;
	margin: 0;
	color: var(--muted);
	font-weight: 800;
}

.table-wrap {
	max-height: 420px;
	margin-top: 14px;
	overflow: auto;
	border: 1px solid var(--line);
	border-radius: 8px;
}

.table-wrap table {
	width: 100%;
	min-width: 760px;
	border-collapse: collapse;
	background: #ffffff;
}

.table-wrap th,
.table-wrap td {
	padding: 10px 12px;
	border-bottom: 1px solid var(--line);
	text-align: left;
	white-space: nowrap;
}

.table-wrap th {
	position: sticky;
	top: 0;
	z-index: 1;
	color: #364357;
	background: #f7f9fc;
	font-size: 13px;
	font-weight: 800;
}

.table-wrap td {
	color: #435166;
	font-size: 14px;
}

.use-grid,
.example-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 14px;
}

.use-grid article,
.example-grid article {
	padding: 18px;
	background: var(--surface-soft);
	border: 1px solid var(--line);
	border-left: 4px solid var(--pay-blue);
	border-radius: 8px;
}

.use-grid article:nth-child(2),
.example-grid article:nth-child(2) {
	border-left-color: var(--pay-cyan);
}

.use-grid article:nth-child(3),
.example-grid article:nth-child(3) {
	border-left-color: var(--pay-warn);
}

.use-grid p,
.example-grid p {
	margin-top: 8px;
	color: var(--muted);
}

.formula-large {
	margin: 14px 0;
	padding: 14px;
	color: #23314a;
	background: var(--surface-soft);
	border: 1px solid var(--line);
	border-radius: 8px;
	overflow-wrap: anywhere;
}

.faq-section details {
	padding: 16px;
	background: var(--surface-soft);
	border: 1px solid var(--line);
	border-radius: 8px;
}

.faq-section details + details {
	margin-top: 10px;
}

.faq-section summary {
	cursor: pointer;
	color: var(--text);
	font-weight: 800;
}

.faq-section details p {
	margin-top: 10px;
}

.disclaimer {
	margin: 18px 0 0;
	padding: 16px 18px;
	color: #5d4a20;
	background: #fffaf0;
	border-color: #efd99c;
	font-size: 14px;
}

[hidden] {
	display: none !important;
}

@media (max-width: 1040px) {
	.payment-hero,
	.payment-workbench,
	.use-grid,
	.example-grid {
		grid-template-columns: 1fr;
	}

	.answer-panel {
		position: static;
	}
}

@media (max-width: 640px) {
	.payment-hero,
	.solver-panel,
	.answer-panel,
	.content-section {
		padding: 18px;
	}

	.solver-tabs,
	.input-strip,
	.answer-grid {
		grid-template-columns: 1fr;
	}

	.answer-main strong {
		font-size: 32px;
	}

	.schedule-heading {
		flex-direction: column;
	}
}